-richards



- (No Model.) 2 Sheets-Sheet 1.

J. RICHARDS.

METAL DRILLING MACHINE.

Np. 261,044. Patented July" 11, 1882.

m. 4 mm, I Z /u% ww;-

2 Sheets -Sheet. 2.

(No Model.) A

J'. RICHARDS.

METAL DRILLING MACHINE.

N0.Z61,0 H44.. Patented Julyll, 1882;.

j V (-i 7Z I J27 7Zi07h UNITED STATES PATENT OFFICE.

JOHN RICHARDS, OF SAN FRANCISCO, CALIFORNIA.

METAL-DRILLING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 261,044, dated July 11, 1882,

Application filed January 17, 1882. (No model.)

cisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Metal-Drilling Machines, of which the following is a specification, reference being bad therein to the accompanying drawings.

This invention relates to machines for drilling metal; and it consists in a new and simple mechanism for feeding and adjusting the spindle of such machines, and in so arranging such mechanism that it can be inclosed in the spindle-frame, as hereinafter more fully set forth.

In the annexed drawings, which fully illustrate the invention, Figures 1 and 2 represent front and side elevations, respectively, of a metal-drilling machine embodying my invention. Fig. 3 is an enlarged section on the line as a: of Fig.1, and Fig. 4 is a plan and section on the line y 3 of Fig. 3.

Like letters indicate like parts in the several views.

A is the main frame of the machine, and B is a table adapted to be adjusted vertically to any desired position. The main frame A has a forward-projecting arm, at the end of which is a hollow cylindrical frame or casing, a, in which is supported the drilling-spindle b and itsoperatingmechanism. Thisdrilling-spindle is actuated by the bevel-gear wheels 0 c and cone-pulleysO in the usual manner. To move the drilling-spindle I) up and down, the handwheel d is turned accordingly. This wheel, by means of its shaft d, operates the upper pair of bevel-gears, e e, which correspond in general to the gears 0 c inverted. On the upper horizontal wheel, 6, is formed a sleeve, f, which is supported in bearings h h. At the upper end of this sleeve, which curves inward at g, is formed, on its inner face, a series of screw-threads fitting corresponding threads on a sleeve, m, which is attached to and forms a continuation of the spindle b, but does not revolve with it. At the top of the inner sleeve, m, there is a notched extension, m, (shown in plan in Fig. 4,) which notch engages with a rib or feather, p, in the interior of the cylindrical case or frame a, and thus prevents the inner sleeve, m, from turning when the outer sleeve, f, is revolved. The spindle bis suspended by a-through-rod, n, that passes up through the sleeve m, and is held by nuts 0 at the top. This rod a is fastened to the spindle b and revolves with it. The gear-wheel e and sleeve f are sustained by a distance-collar, s, that is counterbored into the two horizontal wheels 0 and 0, so that the spindle b will have a continuous bearing throughout its range.

The operation of these feeding devices will be obvious from, the construction illustrated in the drawings. When the hand-wheel dis turned the sleeve f is caused to revolve, and the sleeve on and spindle b are moved up or down accordingly.

The spindle b can be readily removed by unscrewing the nut'o, and all the parts in the casing a can be taken out by removing the foot-bearing t, which is held by screws w w, as shown in Fig. 3.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a metal-drilling machine, the combination, with the casing a, having feather p, the spindle I), provided with rod n, having nut o, and the threaded sleeve m, surrounding said rod and provided with notched projection m, engaging with the feather p, of the threaded sleevef, gears e e, and hand-wheel d, substantially as described.

2. In ametal-drilling machine, the combination, with the casinga and spindle b, inclosedtherein, of the threaded sleeve m, having a loose connection with said spindle, the threaded sleeve f, having gear 0, the gear 0 and hand-wheel d for actuating the sleeves f and m to feed the spindle, and the gears c c and cone-pulley C for rotating said spindle, substantially as described.

In testimony whereofI affix my signature in presence of two witnesses.

JOHN RICHARDS.

Witnesses:

E. It. STEVENS, D. J. PADDOOK. 

